~/.muttrc: Better index (sidebar, format, quicknav).

I especially like the quicknav for changing between folders.

.muttrc

@@ -21,6 +21,33 @@ alternates lu@papill0n.org \
set edit_headers=yes
# index view settings
set date_format = "%m/%d"
set index_format = "[%Z]  %D  %-20.20F  %s"
set sort = threads
set sort_aux = reverse-last-date-received
set uncollapse_jump
set sort_re
set reply_regexp = "^(([RrAa][EeWw]?(\[[0-9]+\])?: *)?(\[[^]]+\] *)?)*"
set markers=no
bind index <space> collapse-thread
macro index C "<copy-message>?<toggle-mailboxes>" "copy a message to a mailbox"
macro index M "<save-message>?<toggle-mailboxes>" "move a message to a mailbox"
# sidebar
set sidebar_visible   = yes
set sidebar_width     = 24
set sidebar_shortpath = yes
bind index,pager <esc>j        sidebar-next
bind index,pager <esc>k        sidebar-prev
bind index,pager <esc><return> sidebar-open
set status_chars  = " *%A"
set status_format = "───[ %f ]───[%r%m messages%?n? (%n new)?%?d? (%d to delete)?%?t? (%t tagged)? ]───%>─%?p?( %p postponed )?───"
# msmtp
set sendmail="/usr/bin/msmtp -a lu"
set from="lu@papill0n.org"